What's the difference between rice balls and sushi?

Different shapes, rice balls are mainly rice, then round, sushi is cylindrical and covered with seaweed.

Different sizes, rice balls are bigger and sushi is smaller.

Rice balls are a traditional Japanese food, mainly made of rice and fish fillets. Producers can add ingredients according to their own preferences, and they can also make rice balls of various styles according to their own preferences.

Sushi is one of the traditional Japanese cuisines, which was later introduced to North Korea and South Korea. Its main ingredient is rice slices seasoned with sushi vinegar and keeping human body temperature, and its ingredients are fish, seafood, vegetables or eggs. It tastes delicious and is very popular with people. Sushi was recorded in the Japanese heian period code "Yan Xi Ti", which was completed in 927 AD. Sushi at that time was a way to preserve fish. Rub the salt on the fish, press it with a heavy object and let it ferment naturally. When the sour taste occurs, it can be wrapped in japonica rice (after being cooked and cooled, it should be rubbed repeatedly).